BizHub 450 Universal tray won't pick up paper

I can print from tray 1 and 3 but tray 2 (universal tray) won't work with any size paper in it. Shows a jam every sheet. Sometimes has pulled the paper out about an inch or so but most of the time the sheet is still in the tray but moved a quarter to half an inch as if the rollers were trying to pick it up but couldn't. Pulled the tray out and the rollers look OK and don't feel glazed over. Feel like they would pick up the paper. Any ideas what is wrong?

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2 things 1st make sure the paper guides are set correctly on the trays for legal make sure it's exactly on legal or it put the tray into universal mode. (To clarfiy the guides in the back which allow you to put legal in the tray.)2nd Go into menu and then to paper menu and adjust/ confirm the settings for tray 1 and 2. Based on your question tray 1 is letter and tray 2 is legal, so make sure both of the tray size and type are set correct.

Turns out that the paper tray was damaged - the tray was unable to determine the correct paper size, despite fooling with the green paper stop. I had to compare it with a known-good tray to see the problem.

Check your paper configuration. Make sure Tray 1 is configured for Plain paper and is showing the right paper size. If it is configured for anything other than Plain Paper, most of your jobs will not print. Also, if the size says something like Univseral, then the printer is not touch that tray unless your print job also specifies Univeral as the size. If is does say Universal, check the paper guide in the tray and make sure it is pointing exactly at the paper size you are using

Your paper size settings for Tray 1 is probably wrong. Make sure it is set to Letter and the type is Plain Paper. If your Paper size is Universal, then either the paper guide in the tray is set wrong or the paper size sensor is broken. If the sensor is broken, you can disable auto paper size sensing so the printer will allow you to specify a paper size. To disable paper size sensing, you need to go into Config Mode. The other way is to send a PJL command to the printer to disable the function.

Click File > Print > Properties to check your settings.
To verify that tray 1 is working, put paper in tray 1. Press green
check until you see Information Menu. Scroll using arrows until you see
Print Menu Map then press green check. If it prints from tray 1, your
problem is not with the printer, but with the PC settings.

i has follow this step, but need to press green check button to resume print menu map.